Tötetsu, the last member of the Four Perils, is eating virtuous monks to increase his demon power, even though he possesses the orange Rainbow Pearl. Taking heed of this, Kohaku sends Hisui, Towa and Setsuna to protect his brother-in-law Miroku, who is participating in a 1000-day training course to increase his spiritual powers tremendously, while Moroha is assigned by Jyübei to protect another monk. Hisui is dissatisfied at first with meeting his father, as he does not approve his behavior. While meeting Miroku, they also meet Hisui's older sister Gyokuto, who is paying a visit to her father...